body{
    margin: 0;
    background-color: beige;
}

.title h2{
    margin: 0 auto;
    text-align: center;
    color: black;
}
.main{;
    background-color: aquamarine;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}

.main table{
    width: 800px;
    height: 500px;
    border: 1px black solid;
    padding: 0;
}
.main tr:first-child{
    font-weight: bold;
    font-size: 20px;
}
.main table tr,td{
    border: 1px black solid;

}
/*除了第七个元素*/
.main table tr td{
    padding: 0;
    text-align: center;
}
.css01{
    display: flex;
    display: -webkit-flex;
/*    align-items: center;*/
    justify-content: space-around;
    border: 1px black solid;
    width: 100%;
    height: 80%;
}
.css01 button{
    width: 10px;
    flex: 1;
    margin-top: 5px;
}
.foot div{
    margin: 10px;
}
.foot button{
    margin-top: 30px;
    margin-left: 60px;
}
